Improvement in tuyeres



J. ROGERS. Tuyere.

Patented Sept. 27, 18-70.

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Josnranoenns, or nnrnoi'r, MICHIGAN.

Letters Patent No. 107,725, dated September 27, 1870.

H 'IMPRQVEMIENT IN TUY'ERES.

-4. -v-- i The Schedule referred to in -these Letters Patent and making pant of the same To all whom it may concern: Be it known that I, J OSEPH ROGERS, of Detroit, in the county of Wayne and State of Michigan, have invented new and useful Improvements in Tuyeres; and I do hereby declare that the following is afull and exact description of theiconstrnction and operation of the same, reference being had to the accompanying drawingand t0 the letters of reference marked. thereon, making a part of-this specification.

My invention relates totuyeres, and consists in certain devices to beused severally, in connection with a notohedaud perforated hearth plate, and which are adapted for usev in heating small, large, or long and narrow pieces Of-lilfititl, all as hereinafter described' ln thedrawing--' Figure 1- represents a top View of the l1earth-plate and the box, of which it forms a part. Figure 2is a side view; and i Figure 3, a central longitudinal section of the same while Figures 4 and 5 represent the respective ends of the box.

I provide a rectangular box, A, having a hinged door, 0, at one end, and closed at the other, except the aperture of the; nozzle b, which is to. receive the blast-pipe.

The door is secured by a catch and latch, in the usual way. i l

A hearth-plate,D, is secured tothe top of the box at the end, by means'of screw'bolts cpassing through flanges formed on the respective parts, as shown'in figs. 2, and 4.

A central aperture is formedin this hearth, andwhen large pieces of metal are 'to be heated, two or.

more bars, E, arelaid across the same, as in fig. 6,

their ends being let into notches or recesses'in the late. f For heating small pieces,in' which case the blast or flame requires to be concentrated, I employ a nozzle, F, which is of such form, and has such projections or ears 0, as adapt it to fit in the aperture of the plate 1). flush with the face thereof, This part F has a central vertical perforation, which is made narrower at the top than at the bottom.

'Au aperture of the same kind isfo'rmed in the nozzle. G, which is used when long bars or pieces,-or several short pieces of metal are tobe heated. This part-is shown in side view in Figure 7, in longitudinal section in Figure 8, in end view in Figure 9, and in central. cross-section in Figure 10.

The lower part is made conical, to fit the aperture in the hearth-plate D, and the long tubular portion provided with a number of perforations on its upper side.

The blast, entering the cylindricalchamber, will be nearly evenly distributed through the small. perforations.

. A shoulder or transverse rib, d, is provided on the bottom of the box, transversely of the same, to form a receptacle for water, 0, which keeps the box cooler than it otherwise would be.

Having thus described my invention,

I claim- Jointly, with the perforated and notched hearthplate D, for use severally and interchangeably therewith, the bars E, the conical perforated plug or nozzle F, and the tubular perforated nozzle G.

Vlitnessesz JOSEPH ROGERS.-

HENRY BRIDGE, GEO. A. Davis. 

